Nudonia is linked to the Old World through a narrow isthmus to the north. This isthmus has been fortified by the Nudonians to resist invasion from the Old World. These fortifications, or perhaps the entire area, are called The Gate to the Old World. Before forming Doraleous and Associates, Doraleous served as a swordsman here, under General Warts and alongside Neebs, who served as an archer.
In the episode Old World Gate, Doraleous and Associates, hearing about an attack on the gate by forces from the Old World, hurried to its defense, but found the attack had already been defeated with the assistance of Broof and Testaclees.